Usually you can instruct java to use xrender by calling java with "-Dsun.java2d.xrender=true" or run "export _JAVA_OPTIONS=-Dsun.java2d.xrender=true" prior to starting the java application. You can also configure that globally: https://serverfault.com/questions/270924/setting-java-runtime-setting-for-al...
This generally should reduce the number of pixmap related calls. But I don't know if it will have any effect on jogl.
Uli
On Tue, Jun 2, 2020 at 10:47 AM Johannes Töger <johannes.toger@med.lu.se> wrote:
I can answer about the GUI toolkit. I was debugging MATLAB performance issues last week so I looked into this.
Matlab uses the jobamp/jogl framework. https://jogamp.org/jogl/www/
In my Ubuntu/x2go/MATE setup, it falls back on a "software OpenGL" mode, which actually looks like MESA/Gallium software rendering:
In Matlab:
opengl info Version: '2.1 Mesa 17.1.3' Vendor: 'Brian Paul' Renderer: 'Mesa X11' MaxTextureSize: 16384 Visual: 'Visual 0x61, (RGBA 32 bits (8 8 8 8), Z depth 16 bits, Hardware acceleration, Double buffer, Antialias 0 samples)' Software: 'true' HardwareSupportLevel: 'none (known graphics driver issues)' SupportsGraphicsSmoothing: 0 SupportsDepthPeelTransparency: 1 SupportsAlignVertexCenters: 0 Extensions: {152×1 cell} MaxFrameBufferSize: 16384
johannes@compute-2:/usr/local/MATLAB/R2019a/sys/opengl/lib/glnxa64$ ls -1 C11ThreadEmulationLibraryLicense.rights EXTHeaderLicense.rights GalliumCodeLicense.rights GLXClientCodeLicense.rights libGL.so.1 libGL.so.1.6.0 libGLU.rights libGLU.so.1 libGLU.so.1.3.1 MesaDeviceDriversLicense.rights MesaLicense.rights
— Johannes Töger
Associate Senior Lecturer Cardiac MR Group Department of Clinical Sciences Lund, Clinical Physiology Lund University, Sweden
-----Original Message----- From: x2go-user <x2go-user-bounces@lists.x2go.org> On Behalf Of Ulrich Sibiller Sent: Tuesday, June 2, 2020 09:15 To: h i <qpile117@outlook.com> Cc: x2go-user@lists.x2go.org Subject: Re: [X2Go-User] Suspending sessions causes performance slowing down
On Tue, Jun 2, 2020 at 3:04 AM h i <qpile117@outlook.com> wrote:
I ran a few tests and see the issue is GUI related in our case. It seems to speak to the 2nd reason for sleep you described regarding the sending of pixmaps.
I ran two MATLAB scripts. Both including the same steps. However, 1 script suppressed pop-windows tracking the script status. The 2nd script did not suppress the pop-up windows displaying
What gui toolkit is matlab using?
real-time status. The 1st script involving command lines ran in the same amount whether the session was active or suspended. No reduction of time or CPU usage. The 2nd script took much longer and CPU was reduced significantly while the session was suspended.
A few questions:
for X2GO_NXOPTIONS="sleep=0", what does 0 represent in time. If I set the value to 1000, what would that mean?
This defines how long nxagent should sleep. The unit should be microseconds but there's a ticket for doublechecking that because it looks like a mixup happened during implementation (https://github.com/ArcticaProject/nx-libs/issues/928).
Is the idle-nice-level=19 for suspended sessions the default setting?
As I said I don't know the superreniver feature in detail.
Would the supernicer setting override the x2goagent sleep option setting?
no, they are two different things.
What would be an example command for the -irlimit option in x2goagent.options file.
see https://github.com/ArcticaProject/nx-libs/issues/796
Uli
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